/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.linkis.manager.common.operator;

import org.apache.linkis.governance.common.exception.GovernanceErrorException;

import java.util.Map;

public interface Operator {

  String[] getNames();

  Map<String, Object> apply(Map<String, Object> parameters) throws GovernanceErrorException;

  // todo
  default <T> T getAs(Map<String, Object> parameters, String key, T defaultVal) {
    Object value = parameters.getOrDefault(key, defaultVal);
    if (value == null) {
      return null;
    } else {
      try {
        return (T) value;
      } catch (Exception e) {
        throw new GovernanceErrorException(20305, "Unknown class type, cannot cast " + value + ".");
      }
    }
  }

  default <T> T getAsThrow(Map<String, Object> parameters, String key) {
    Object value = parameters.get(key);
    if (value != null) {
      try {
        return (T) value;
      } catch (Exception e) {
        throw new GovernanceErrorException(20305, "Unknown class type, cannot cast " + value + ".");
      }
    } else {
      throw new GovernanceErrorException(20305, "The parameter of " + key + " does not exist.");
    }
  }
}
